Galapagos Island Volcanoes Are Hiding Explosive Magma Deep Beneath Surface
Volcanoes around the world vary significantly when it comes to the kind of eruptions they produce. Some may lie dormant for decades, centuries or even millennia before explosively and violently erupting—think Mount St. Helens in 1980, for example. On the other hand, many volcanoes reliably spew out lava consistently for thousands, or even hundreds of thousands of years, like those in Hawaii, Iceland and the Galápagos Islands. These reliable lava flows are made up of molten basalt—a common form of volcanic rock—that tend to be very uniform in their chemical make up....